---
version: 2.1

orbs:
  go: circleci/go@0.2.0

jobs:
  test:
    parameters:
      go_version:
        type: string
      run_style:
        type: boolean
        default: false
      run_lint:
        type: boolean
        default: false
      use_gomod_cache:
        type: boolean
        default: true
    docker:
    - image: circleci/golang:<< parameters.go_version >>
    working_directory: /go/src/github.com/prometheus/client_golang
    steps:
    - checkout
    - when:
        condition: << parameters.use_gomod_cache >>
        steps:
        - go/load-cache:
            key: v1-go<< parameters.go_version >>
    - run: make check_license unused test
    - when:
        condition: << parameters.run_lint >>
        steps:
        - run: make lint
    - when:
        condition: << parameters.run_style >>
        steps:
        - run: make style
    - when:
        condition: << parameters.use_gomod_cache >>
        steps:
        - go/save-cache:
            key: v1-go<< parameters.go_version >>
    - store_test_results:
        path: test-results

workflows:
  version: 2
  client_golang:
    jobs:
    # Refer to README.md for the currently supported versions.
    - test:
        name: go-1-9
        go_version: "1.9"
        use_gomod_cache: false
    - test:
        name: go-1-10
        go_version: "1.10"
        use_gomod_cache: false
    - test:
        name: go-1-11
        go_version: "1.11"
        run_lint: true
    - test:
        name: go-1-12
        go_version: "1.12"
        run_lint: true
    - test:
        name: go-1-13
        go_version: "1.13"
        run_lint: true
    - test:
        name: go-1-14
        go_version: "1.14"
        run_lint: true
        # Style is only checked against the latest supported Go version.
        run_style: true